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Although power-line communication (PLC) is not a new technology, its use to support data communication with timing requirements is still the focus of ongoing research. A new infrastructure intended for communication using power lines from a central location to dispersed nodes using inexpensive devices was presented recently. This new infrastructure uses a two-level hierarchical power-line system,...
For supporting applications with different timing constraints, a PLC (power line communication) system must provide differentiated QoS (quality of service). In this paper a traffic dispatching policy is specified and implemented which guarantees both required periodic data update and short end-to-end delay of aperiodic data request services. This policy is compared with the classic dual-priority one...
Installing a power line communication infrastructure for energy management that allows collecting and deploying information down to the premises of customers requires an integrated security system. Otherwise the risk of malicious use of the network and the connected control facilities would imply a risk much too high. This article describes the security functions and the key management system of the...
In modern communication networks the task of synchronizing the system clock of nodes is of growing interest. Especially in sensor networks synchronized applications are of crucial importance, but a global view of the system status can only be examined if the individual data acquisitions are exactly related to each other. This imposes constraints on the implementation that are rarely discussed. The...
Maintaining a hierarchical communication system with different components participating in data exchange is a complex task that requires a management infrastructure, which allows controlling and monitoring all components. This paper introduces the management system concept for a communication system that is based on power-line communication (PLC) and an IP-based backbone. The management system is...
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